Jimmycliff

Cheers all, as I thought

Hello all, I am planning a garden workshop under PD. 15m square floor space and 2.5m height with probably mono pitched roof. My question relates to where in my garden I can measure the overall height as my house sits about 400mm above the lawn level. Between the house and the garden room site, there is a small patio (at ‘house height’) then a good 5m expanse of lawn at the lower level. Would I be able to take my reading for max height from the patio (ie ~400mm higher than build site)? Or does the building have to be in contact with the higher ground for this to be viable? I have watched Ali Dymock’s (excellent) videos on this, and feel the answer is the latter, but thought I would enquire here to see if anyone has any extra intel. Apologies if this has been covered elsewhere. Thanks in advance, Jimmy